TM 55-4920-401-13&P
Table 1-9. J-K Flip-Flop Truth Table.
11. Decade Counter (SN5490). W h e n
10. The counter is clocked by logic 0 pulses at termi-
output QA (fig. 1-38) is connected to input BD, the
nal 14 and cleared to zero by logic 1 applied to ter-
circuit provides a BCD output as shown in table 1-
minals 2 and 3.
Figure 1-38.
Decade Counter.
1-38
